One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,10)(5,16)(6,14)(7,11)(8,15)(9,13)(17,18)(19,20)(21,25)(22,23)(24,27)(26,28)(29,30)(31,32)(33,34,39,36)(35,42,38,40)(37,41,46,44)(43,48,45,47)(1,3)(2,6)(4,5)(7,14)(8,16)(9,10)(11,12)(13,15)(18,23)(20,24)(25,32)(28,29)(33,34,39,36)(35,40,38,42)(37,41,46,44)(43,47,45,48)(1,4)(2,8)(3,13)(5,14)(6,9)(7,15)(10,11)(12,16)(17,19)(18,24)(20,23)(21,26)(22,27)(25,29)(28,32)(30,31)(33,35,39,38)(34,40,36,42)(37,43,46,45)(41,47,44,48)(1,5,7,13)(2,9,11,16)(3,4,14,15)(6,10,12,8)(17,20,22,24)(18,19,23,27)(21,29,31,28)(25,30,32,26)(33,36,39,34)(35,42,38,40)(37,41,46,44)(43,47,45,48)(1,4)(2,10)(3,5)(6,9)(7,15)(8,11)(12,16)(13,14)(17,21,22,31)(18,25,23,32)(19,26,27,30)(20,28,24,29)(33,37,39,46)(34,41,36,44)(35,43,38,45)(40,47,42,48)(1,6)(2,3)(4,9)(5,10)(7,12)(8,13)(11,14)(15,16)(17,19)(18,24)(20,23)(21,30)(22,27)(25,28)(26,31)(29,32)(33,38,39,35)(34,42,36,40)(37,45,46,43)(41,48,44,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.